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Black holes are created from something extremely dense in a small space. The most common cause is a supernova.
It is currently believed that most, if not all, galaxies contain supermassive black holes at their centers. These black holes can vary in size, with some being relatively small and inactive. However, the presence of supermassive black holes in galaxies is a common feature in the universe.
Black holes - and not all are small.
Theoretically they can be as large as a small star or as large as a galaxy
Black holes have no atmosphere, they are entirely empty except for a singularity at the very center containing the entire mass of the black hole in one infinitesimally small point (or if the black hole is spinning, one circular spinning ring of infinitesimally small thickness).
One of the LHC's objectives is to create micro black holes. These holes are so small however, they evaporate into radiation almost immediately.
Primordial black holes are theoretical black holes that could have formed in the early universe. They are thought to be small and have a wide range of masses. If they exist, they could have implications for dark matter, gravitational waves, and the evolution of the universe.
Primordial black holes are thought to have formed in the early universe due to fluctuations in density. These black holes are believed to be small and have a range of masses. They are not formed from the collapse of massive stars like regular black holes. Primordial black holes are difficult to detect because they do not emit light. Scientists are still studying these mysterious objects to better understand their formation and characteristics.
stellar black holes were stars (these are large)primordial black holes were pieces of the big bang (these are microscopic)
Black holes are extremely dense, with a mass packed into a very small volume. This high density creates a gravitational pull so strong that not even light can escape from them.
No. Black holes do not give off anything other than small amounts of Hawking radiation. That note aside, scientists do not know what dark matter is or what its origin is.
No. It certainly has black holes, but it has other things as well.No. It certainly has black holes, but it has other things as well.No. It certainly has black holes, but it has other things as well.No. It certainly has black holes, but it has other things as well.